Question: 14. The correlation calculated in Problem 3a (rpre;post :68) indicates a considerable advantage to using the same participants under both conditions rather than two independent

14. The correlation calculated in Problem 3a (rpre;post ¼þ:68) indicates a considerable advantage to using the same participants under both conditions rather than two independent groups of five participants each. To see this advantage more directly, reanalyze the data in Problem 3 as if the scores were from independent groups (of five participants each). Compare the two sets of results with respect to sX1X2 and the sample t ratio.

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